Arrangement for a turbine

Abstract

An arrangement for a turbine has a metallic support structure having at least one radial support strut and a multiplicity of plate-shaped, fiber-reinforced ceramic segments which are arranged one on top of the other on the support structure and together define the circumferential contour, the segments being provided with through-openings through which the at least one support strut extends, wherein the at least one support strut has outwardly-extending projections that extend perpendicular to the radial direction and engage in corresponding recesses formed in the segments.

The invention claimed is: 
     
       1. An arrangement for a turbine, comprising:
 a metal support structure comprising at least one support strut comprising a longitudinal axis, and 
 a multiplicity of segments arranged in a stack on the metal support structure, wherein each segment of the multiplicity of segments comprises a flat shape comprising a thickness along the longitudinal axis and a width that extends along a second axis that is transverse to the longitudinal axis, wherein the width is greater than the thickness, and wherein each segment comprises a ceramic fiber composite material, 
 wherein the multiplicity of segments together define at least one part of a circumferential contour of the arrangement, 
 
       wherein each segment of the multiplicity of segments comprises a through-opening, wherein in the stack the through-openings align to form a first stack opening of through-openings that extends along the longitudinal axis, and wherein a first support strut of the at least one support strut is disposed within the stack of through-openings and extends along the longitudinal axis thereby passing through at least two of the through-openings, and
 wherein the first support strut comprises at least one outwardly protruding projection extending along the second axis, wherein the at least one outwardly protruding projection engages in at least one correspondingly designed recess on at least one segment of the multiplicity of segments. 
 
     
     
       2. The arrangement as claimed in  claim 1 ,
 wherein the at least one support strut further comprises a second support strut that extends along the longitudinal axis and a third support strut that extends along the longitudinal axis, wherein the second support strut and the third support strut are positioned at different locations along the second axis, 
 wherein each segment of the multiplicity of segments further comprises a second through-opening and a third through-opening, wherein in the stack the second through-openings align to form a second stack opening which extends along the longitudinal axis and through which the second support strut extends along the longitudinal axis thereby passing through at least two of the second through-openings, and 
 wherein in the stack the third through-openings align to form a third stack opening which extends along the longitudinal axis and through which the third support strut extends along the longitudinal axis thereby passing through at least two of the third through-openings. 
 
     
     
       3. The arrangement as claimed in  claim 1 , wherein the first support strut comprises a non-round cross section. 
     
     
       4. The arrangement as claimed in  claim 3 , wherein the at least one support strut comprises a cross section which follows the circumferential contour of the arrangement. 
     
     
       5. The arrangement as claimed in  claim 1 , wherein the first support strut is hollow. 
     
     
       6. The arrangement as claimed in  claim 1 ,
 wherein the metal support structure comprises a platform which extends parallel to the multiplicity of segments, wherein the at least one support strut extends along the longitudinal axis from the platform, and 
 wherein the multiplicity of segments are stacked on the platform. 
 
     
     
       7. The arrangement as claimed in  claim 1 , wherein each correspondingly designed recess of the at least one correspondingly designed recess forms a respective annular gap surrounding the first support strut. 
     
     
       8. The arrangement as claimed in  claim 1 , wherein each correspondingly designed recess of the at least one correspondingly designed recess is recessed into an upper side of a respective segment of the at least one segment. 
     
     
       9. The arrangement as claimed in  claim 8 , wherein each correspondingly designed recess comprises a chamfer where the upper side meets the through-opening. 
     
     
       10. The arrangement as claimed in  claim 1 , wherein each projection of the at least one outwardly protruding projection engages in a respective correspondingly designed recess of the correspondingly designed recess in a form-fitting manner. 
     
     
       11. The arrangement as claimed in  claim 1 , wherein each segment of the multiplicity of segments comprises a respective correspondingly designed recess of the at least one correspondingly designed recess with which a respective outwardly protruding projection of the at least one outwardly protruding projection engages. 
     
     
       12. The arrangement as claimed in  claim 1 , further comprising a coating disposed on respective outer surfaces of some segments of the at least one segment. 
     
     
       13. The arrangement as claimed in  claim 12 , wherein the coating comprises a thermal barrier coating. 
     
     
       14. The arrangement as claimed in  claim 1 , wherein the arrangement is an arrangement for a turbine blade, or is an arrangement for a part for the turbine which is exposed to impingement by hot gas. 
     
     
       15. The arrangement as claimed in  claim 1 , wherein the arrangement is an arrangement for a blade airfoil, or is an arrangement for a ring segment for the turbine which is exposed to impingement by hot gas. 
     
     
       16. A method for producing the arrangement as claimed in  claim 1 , the method comprising:
 using a generative method to produce at least the at least one support strut of the metal support structure. 
 
     
     
       17. The method as claimed in  claim 16 , wherein the stack comprises plural layers, each layer of the plural layers comprising a respective segment and a respective portion of the first support strut, the method further comprising:
 forming each layer of the stack sequentially, 
 wherein in at least one layer of the plural layers comprises the respective segment comprises a respective outwardly protruding projection of the at least one outwardly protruding projection. 
 
     
     
       18. The method as claimed in  claim 17 , further comprising using a robot to position each segment.